Failed to add appliance to the cluster

Problem

After a successful migrate-db process, the attempt to add a new appliance to cluster (System > Appliances > Add) fails with the pop-up error:  Failed to add appliance.  ([#164026] Clearwell appliance <Worker Node>:2595 can't reach appliance <Cluster Master>:2595. Please verify that the network connection is functioning properly.)

Error Message

Failed to add appliance. ([#164026] Clearwell appliance <Worker Node>:2595 can't reach appliance <Cluster Master>:2595. Please verify that the network connection is functioning properly.)

Cause

Java sends a request to the operating system of the worker node IP address to communicate with resources outside of the server.  Microsoft Windows is providing the wrong Network Interface Card (NIC) to communicate.

Solution

1. Execute ROUTE PRINT to verify that two or more NICs are installed

Open a command prompt and type 
ROUTE PRINT

If there are two Gateways listed, there are multiple Nics active on the server (See Figure 1).

Figure 1

2. Follow the guidelines in the technical article below to add an additional 20 to the metric value of the unwanted Nic(s).
 
"Multiple NICs (Network Interface Cards) causing communication issues with external endpoints"
https://www.veritas.com/support/en_US/article.100043882

3. Execute ROUTE PRINT again to verify the metric value for the desired Nic is the lower metric cost (value).

4.  Attempt to add the new appliance to the cluster.